173 results about "Mechanical stretching" patented technology

An efficient, in-line method for forming an elastic laminate is provided. To form the laminate, a polymer composition containing an elastomeric polymer is extruded as a film. In one embodiment, the film is uniaxially oriented in the machine direction (“MD”), or optionally, biaxially oriented in the machine direction and the cross-machine direction (“CD”). Regardless, the elastic film is then laminated to a nonwoven web material. Prior to lamination, the percent stretch of the nonwoven web material is generally no more than 25% when 500 grams-force is applied per 3 inches of the material in either the cross-machine or machine direction. Such a relatively inextensible nonwoven web material may restrict the overall extensibility of the laminate. Thus, to improve extensibility, the resulting laminate is mechanically stretched in the cross-machine and/or machine directions. Extensibility may also be improved by allowing the laminate to relax and retract prior to winding so that the nonwoven web material gathers or forms buckles.

Methods for aligning nanoscale fibers are provided. One method comprises providing a network of nanoscale fibers and mechanically stretching the network of nanoscale fibers in a first direction. The network of nanoscale fibers is substantially devoid of a liquid. A network of aligned nanoscale fibers and a composite comprising a network of aligned nanoscale fibers are also provided.

The invention provides a fabric analysis system and method based on biaxial mechanical stretch processing. The fabric analysis system comprises a lighting device, an optical observation imaging system, a signal acquisition control system, a fabric image analysis module and a computer and is characterized in that a biaxial mechanical stretching device is used for performing biaxial mechanical stretching on a fabric sample, so that tissue structures of the fabric sample are clear; the lighting device is used for lighting the fabric sample; the optical observation imaging system is used for photographing an image of the fabric sample; the image is input into the computer through the signal acquisition control system; the signal acquisition control system is used for acquiring and controlling the image of the fabric sample and a signal; the fabric image analysis module is used for performing tissue point region identification, tissue type analysis, dyed yarn arrangement analysis, counting of weft and warp density and proportional recovery calculation on the image of the fabric sample to obtain a total fabric analysis result. The fabric analysis system is convenient for measurement and identification of tissue types, yarn colors and weft and warp densities of fabrics comprising complicated fabrics and can improve the automation degree and the precision of fabric analysis.

The invention is refer with an electromechanical stretching apparatus of a convertible sofa, which consisting of a mechanical stretching apparatus and an electric actuator, the mechanical stretching apparatus being provided with an electrically-driven connecting rod, wherein, the electric actuator consists of a motor, a motor connecting tube, a motor movable slider, and a motor head fixing part, the motor adopted is a motor with a guide rail, the motor movable slider is installed on the guide rail of the motor, the motor head is rotationally connected through a second rotor shaft to the motor head fixing part fastened on the electrically-driven connecting rod, the motor connecting tube is connected to the motor movable slider through a first rotor shaft and the motor connecting tube is fastened on the mechanical stretching apparatus. The said motor connecting tube is fastened on a linkage part of the mechanical stretching apparatus. The said first rotor shaft and the second rotor shaft are both a bolt. By changing the electronic driving device, the invention increases automaticity and comfort of the convertible sofa, and improves installation, removal, maintenance, and operation efficiency of an electric actuator of the convertible sofa.

The invention relates to a mechanical stretching device for a multifunctional convertible sofa, which is mainly applied to a convertible sofa, and is a furniture component. The mechanical stretching device includes a first foot lever, a second foot lever, a third foot lever, a fourth foot lever, a side plate, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a first support member, a second support member, a linkage member, a seahorse member, a rotating shaft transmission member, a spring, and a bottom connecting rod. A first limiting surface and a second limiting surface are disposed on the second foot lever, a third limiting surface is disposed on the fourth foot lever, a fourth limiting surface and a fifth limiting surface are disposed on the side plate, a sixth limiting surface and a seventh limiting surface are disposed on the second connecting rod, an eighth limiting surface is disposed on the sixth connecting rod, a ninth limiting surface is disposed on the first support member, and a tenth limiting surface is disposed on the linkage member. The structure is reasonably designed, the length increased by unfolding is substantially the same as the length reduced by folding, a back is loose by about 3 mm, and a product subsides by about 2 mm.

The invention discloses a micro-fluidic chip culture device of cells capable of being stretched mechanically. The cell culture device comprises a cell culture layer, a polydimethylsiloxane (PDMS) film and a liquid flow control layer, wherein the cell culture layer, the PDMS film and the liquid flow control layer are overlaid in sequence. At least one micro channel is arranged on the liquid flow control layer, at least one chamber is arranged on the micro channel, and the height of the at least one chamber is equal to that of the at least one micro channel. Cell culture ponds are arranged on the cell culture layer, the number of the cell culture ponds is equal to that of the at least one chamber, the PDMS film is arranged at the bottom of the cell culture pond, and the shape of the cell culture pond is identical to that of the at least one chamber. Along the direction from the liquid flow control layer to the cell culture layer, the positions of the cell culture ponds and the at least one chamber correspond mutually, the inlet and the outlet of the at least one micro channel penetrate through the PDMS film and the cell culture layer in sequence to be communicated with the outside. The micro-fluidic cell culture device can be used for researching the response of the cells to mechanical stretching force, and is simple, sensitive and reliable.

This invention discloses a cell loading experimental machine by numerically controlled mechanical strain. The cell loading experimental machine comprises a computer, a controller, and a mechanical strain device. The controller adopts a single chip microcomputer to control the stepping motor with photoelectric encoder displacement feedback. The stepping motor drives the precision cam transmission system, which then drives the semispherical top plate to move to-and-from. The semispherical top plate top-presses the elastic cell culture dish so that cells are subjected to mechanical stretching strain. The cell loading experimental machine can apply dynamic mechanical stretching strains with different strengths, frequencies and times to the cells cultured in vitro, and has such advantages as wide strain output range, high precision, easy operation and direct display.

The present disclosure relates to a hybrid fastener system involving combining mechanical tensile features with magnetic components.

The invention discloses a preparation method of a high-orientation communicated BN composite fiber material. According to the method, BN nano-sheets or BN nano-particles with the diameters in the range from 50 nm to 200 nm are selected and added into a polymer solution to obtain an inner core spinning solution and an outer shell spinning solution, and the high-orientation communicated BN compositefiber material is obtained after coaxial directional electrostatic spinning and mechanical stretching treatment. The high-orientation communicated BN composite fiber material prepared by means of themethod improves the BN orientation; a coherent and perfect heat conduction passage of the formed high-orientation communicated BN composite fiber material has a better heat dissipation effect and better orientation in the field of heat dissipation and insulation and obtains a broad application prospect in the fields of microelectronic packaging, electrical insulation and LED illumination.

The invention relates to an electric and mechanical stretching device of a movable sofa, which comprises a mechanical stretching device and an electric device, wherein the electric device consists of a motor, a motor-driven assembly, a motor head fixing piece and an electric connecting rod; the motor-driven assembly is in a fixed overall structure; a motor head is rotationally connected with the motor head fixing piece fixed on the electric connecting rod; the motor-driven assembly is rotationally connected with the mechanical stretching device by a first rotating shaft, and consists of a motor slide block fixing support, a transmission connecting piece, a fixing support connecting piece and a motor motion slide block; the motor slide block fixing support is fixed on the motor motion slide block; the fixing support connecting piece is connected with the motor slide block fixing support; the motor slide block fixing support is fixedly connected with the transmission connecting piece; the transmission connecting piece is rotationally connected with a leg laying drive of the mechanical stretching device by the first rotating shaft. The stretching device changes the original motor-driven device, so that electric mounting and operating efficiency of the movable sofa can be improved, and the automation degree and the comfort of the sofa are raised and improved.

The invention relates to a dual-drive mechanical stretching device which comprises two stretching mechanisms, a driving assembly A, a driving assembly B and a base, wherein the two stretching mechanisms are arranged on the left and right sides of the base; each stretching mechanism comprises a backrest assembly, a support assembly and a bracket assembly; the lower ends of the support assemblies are hinged to the base; the backrest assemblies are hinged to the rear ends of the support assemblies; the bracket assemblies are hinged to the front ends of the support assemblies; the driving assembly A comprises a driving connecting rod A which is connected with the rear ends of the two bracket assemblies, a flexible power mechanism A and a driving connecting rod C which is connected with the rear ends of the two support assemblies; two ends of the flexible power mechanism A are respectively hinged to the driving connecting rod A and the driving connecting rod C; the driving assembly B comprises a driving connecting rod B which is connected with the front ends of the two support assemblies and a flexible power mechanism B; the two ends of the flexible power mechanism B are respectively hinged to the driving connecting rod B and the rear end of the base. The two independent driving assemblies are respectively arranged to control the bracket assemblies and the support assemblies, so that the comfort level is high and the adjusting range is broad.

The invention discloses a six-link mechanical arm device with adjustable degree of freedom. The six-link mechanical arm device comprises a mechanical arm connecting seat, the upper end of the mechanical arm connecting seat is connected with a high-power motor, the upper end of the high-power motor is connected with a rotating rod, the left end of the rotating rod is connected with a fixed shaft bending rod, the left lower portion of the fixed shaft bending rod is connected with a mechanical stretching and lifting rod, the lower end of the mechanical stretching and lifting rod is connected with a manipulator connecting rod, the lower end of the manipulator connecting rod is connected with a clamping manipulator, the rotating rod is connected with the fixed shaft bending rod through an adjustable rotating shaft, a telescopic cylinder is arranged between the lower end of the rotating rod and the left end of the fixed shaft bending rod and connected with the fixed shaft bending rod through a cylinder connector, and the left end of the fixed shaft bending rod and the lower end of the mechanical stretching and lifting rod are connected with a direction adjuster. The six-link mechanical arm device solves the problems that only the direction of a clamping portion of an existing six-link mechanical arm can be adjusted, and the directions of other links are manually adjusted, so that the mechanical arm is insufficient in flexibility when in operation.

The invention discloses a mechanical stretching device and a seat unit, comprising a fixed bottom rod, a front support rod and a rear support rod rotating in a vertical plane, a cushion board and a backrest arranged on top of the front and rear support rods and connected a board, an ottoman couch, and an ottoman assembly for extending and retracting the ottoman couch; the bottom end of the front support bar is hinged to the front end of the bottom bar, and the bottom end of the rear support bar is hinged to the rear of the bottom bar, The top of the front support rod is hinged with the footrest assembly, and the upper part of the rear support rod is connected to the rear of the cushion board through the intersecting first connecting rod and the second connecting rod; Seat unit, the overall structure of the present invention is simple, two intersecting first connecting rods and second connecting rods are arranged between the cushion board and the rear support rod, the overall operation is stable, and the seat cushion can be rotated during the reclining process of the backrest board. It works by turning a small angle with the backrest, and at the same time can reduce the lifting height of the cushion board, improving the sitting comfort.

The invention provides a feeding deep-sea optical cable, which comprises an optical unit, an armored layer, a feeding layer and an insulating layer, and is characterized in that the armored layer comprises an inner stranded layer and an outer stranded layer, the inner stranded layer is provided with a plurality of first stranding metal wires, the outer stranded layer is provided with a plurality of second stranding metal wires and a plurality of third stranding metal wires, the second stranding metal wires and the third stranding metal wires are alternatively arranged in sequence, and the diameter of the third stranding metal wires is less than the diameter of the second stranding metal wires; the plurality of first stranding metal wires are stranded outside the optical unit, the second stranding metal wires and the third stranding metal wires are stranded on the first stranding metal wires at intervals, the third stranding metal wires are stranded on the second stranding metal wires, and stranding directions are the same. The feeding deep-sea optical cable improves the impact resistance, the flattening resistance and the mechanical stretching performance of submarine cables, improves the longitudinal water blocking performance and the radial water blocking performance of the submarine cables, reduces the manufacturing cost and maintenance cost of the submarine cables, reduces damages for an optical fiber in the manufacturing process and improves the insulating performance of the submarine cables.

The invention discloses a flexible shearing-anti-shearing test fixture which comprises clamp bodies, a pull rod, a guide rod, a linear bearing, a pressing plate and a shearing knife. Meanwhile, the invention also discloses a shearing testing method of the flexible shearing-anti-shearing test fixture. The flexible shearing-anti-shearing test fixture and the shearing testing method thereof have thefollowing beneficial effects: the shearing and anti-shearing tests of a board can be realized without the need to replacing parts; and shearing testing of boards with different thicknesses and thin plates in a thickness direction can be realized. The distance of the shearing knife plane can be adjusted by replacing the fixture shearing knife; and the mechanical properties of the board under the double-load stretching-shearing effect at different distances can be tested. On the basis of the pull rod structure, the fixture can be installed at a universal mechanical stretching testing machine tocarry out shearing and anti-shearing tests. The two clamp bodies employ a reverse symmetric mounting structure and the pull rod is installed at the symmetric central line of the fixture assembly, so that the influence on the test result by the unbalance loading is reduced effectively.

The invention discloses a metal sheet pre-stretching mold, belonging to the technical field of mechanical stretching. The mold includes two symmetric sides, one of which comprises: an upper mold holder, an upper wedge block, a lower wedge block, a sheet clamping block, a sheet placement platform, a slide groove and a lower mold holder, wherein the upper wedge block is fixed on the upper mold holder, the slide groove is fixed in the length direction of the lower mold seat, the sheet clamping block is arranged inside the lower wedge block, the lower edge block is movably connected with the slide groove, and the sheet placement platform is fixed on the lower mold holder. The mold has the characteristics of easy control of sheet deformation, simple structure, convenient sheet loading and unloading, safe and reliable molding process, and the suitability for the pre-stretching deformation of sheets in two sizes, namely the maximal width is 150mm, the maximal thickness is 4mm and the length is either 300mm or 450mm.

The invention discloses a method for preparing an ordered porous film in an orthogonal embossing induction manner. The method comprises the following steps: preparing a pre-polymer from a PDMS pre-polymer and a cross-linking agent; degassing, drying and curing to obtain a PDMS elastic body; preparing a PDMS wrinkle template with strip-shaped wrinkles at different periods by adopting a mechanical stretching method; preparing a base with a macromolecular film; contacting the wrinkle template and the base face to face in a manner that the wrinkle directions of the wrinkle template and the base are mutually vertical; cooling the wrinkle template and the base at a macromolecular film glass transition temperature or a slightly high temperature for 1 hour to a room temperature; and removing the wrinkle template and forming a nano-grade ordered porous structure on the surface of a micron-grade wrinkle structure of a base thin film. According to the method, the ordered porous film is prepared from the PDMS wrinkle template in the orthogonal embossing manner, so that micron-grade wrinkles and nano-grade pores are organically combined, and the porous structure can be obtained by using simple instruments and equipment; and the utilization of the instruments with the high construction cost and the complicated operation steps are avoided.

The present invention relates to a microstructure observation device applicable to metal material bending deformation, and belongs to the field of metal plastic forming. The microstructure observation device applicable to metal material bending deformation includes a mechanical stretching module, a mechanical test module and a bending module. The center of a sample to be tested is located above a bending roller in the bending module; two sides of the sample to be tested pass under a rotating wheel 1 and a rotating wheel 2 of the bending module, and two ends of the sample are clamped by a chuck 1 and a chuck 2 of the mechanical stretching module; tensile load is applied to both ends of the sample to be tested, and the sample to be tested is subjected to bending deformation at the bending roller position; and the microscopic deformation field characteristics of the deformation zone of the sample to be tested is measured by a microscope, and the macroscopic mechanical property parameters of the sample to be tested under corresponding deformation conditions are obtained by the mechanical test module. The device realizes the in-situ observation of field of the maximum deformation zone in the bending process of metal, and macroscopic mechanical properties of the material are established by a mechanical sensor and a displacement sensor.

The invention discloses a high depth-to-width ratio nanofiber structure based on mechanical stretching and a preparation method of the high depth-to-width ratio nanofiber structure. The preparation method comprises the following steps: 1, preparing a flexible pore array die by adopting a replication method; 2, coating the solution of a polymer on a base material to form a polymer film; 3, enabling the flexible pore array die to be in excellent contact with the polymer film and enabling the polymer to be filled into pores on the die; 4, finally, carrying out mechanical stretching on the polymer film through the flexible pore array die, and curing and demoulding after completing stretching so as to prepare the high depth-to-width ratio nanofiber structure of which the end part is provided with a mass block. According to the invention, high depth-to-width ratio nanofibers can be formed through the mechanical stretching of the die on the polymer; the difficult problems generated in the process of preparing the high depth-to-width ratio nano-structure in the replication method are solved; the high depth-to-width ratio nanofiber structure has a simple process structure and is prepared only by mechanical stretching through controlling the direction of mechanical stretching; compared with methods such as an electrospining method, a chemical method and a micro nano processing method, the preparation method of the high depth-to-width ratio nanofiber structure is more effective and economic.

The invention discloses an automatic sofa stretching device. The automatic sofa stretching device comprises an electric device and a mechanical stretching device, wherein the electric device is composed of a motor (19) and a power push rod (20); the mechanical stretching device is composed of a connecting plate a (1), a connecting plate b (2), a connecting rod (3), a connecting plate c (4), a connecting plate d (5), a push rod a (6), a push rod b (7), a push rod c (8), a push rod d (9), a push rod e (10), a push rod f (11), a motor fixing rod a (12), a connecting plate e (13), a push rod g (14), a push rod h (15), a connecting plate f (16), a motor fixing rod b (17), a connecting plate j (18) and a connecting plate k (21).

The invention discloses shape memorizing polyurethane and a preparation method thereof. The preparation method comprises the following steps: reacting a first mixing reaction system which is composedof polycaprolactone diol, diisocyanate, a catalyst and an organic solvent to obtain a polyurethane prepolymer; reacting a second mixing reaction system which is composed of the polyurethane prepolymer, a spiral nonplanar chain extender or a planar chain extender and an organic solvent; and curing the reaction product to obtain the shape memorizing polyurethane. The preparation method is simple andconvenient to operate, and efficient in synthesizing process; the prepared shape memorizing polyurethane is outstanding in triple shape memorizing performance and mechanical stretching performance; the elongation at break of the polyurethane is 500-600%; the stretching strength is 15-20MPa; the thermal decomposition beginning temperature is 280-320 DEG C; the secondary circular shape fixing ratein a shape memorizing curve is 91-99%, and the secondary circular shape recovery rate is beyond 95-99%.

The invention relates to a method for preparing a direct band-gap germanium thin film. The method comprises a GeOI substrate. A top layer germanium nanometer thin film is carried out a graphical processing, and a plurality of corrosion windows communicated with a bottom buried oxide layer is open. The buried oxide layer is carried out a wet etching until the buried oxide layer is thoroughly corroded so that the graphical top layer germanium nanometer thin film and a silicon substrate are virtually contacted. A polydimethylsiloxane (PDMS) carrier is provided and the PDMS carrier is closely connected with the top layer germanium nanometer thin film, so that the top layer germanium nanometer thin film virtually connected with the silicon substrate is transferred to the PDMS. Both ends of the PDMS carrier is clamped and carried out a reverse mechanical stretching so that the top layer germanium nanometer thin film can carry out deformation with the stretching of the polydimethylsiloxane carrier and produce a tensile strain inside. The strain size of the direct band-gap germanium thin film prepared with this method is controllable and can be used for a photoelectric device. The direct band-gap germanium thin film has the advantages of being small in defects and low in dislocation density. The method and technology for the direct band-gap germanium thin film prepared by the mechanical stretching is simple, and the cost is low.